resulted in a wrong error message.

The nest_level counter indicates the depth of nesting for a subselect. It is
needed to properly resolve aggregate functions in nested subselects. Obviously 
it shouldn't be incremented for UNION parts because they have the same level of
nesting. This counter was incremented by 1 in the mysql_new_select() function
for any new select and wasn't decremented for UNION parts. This resulted in
wrongly reported error messages.

Now the nest_level counter is decremented by 1 for any union part.


mysql-test/t/union.test:
  Added test case for the bug#18175: The nest_level counter wasn't decremented for union parts which
  resulted in a wrong error message.
mysql-test/r/union.result:
  Added test case for the bug#18175: The nest_level counter wasn't decremented for union parts which
  resulted in a wrong error message.
sql/sql_yacc.yy:
  Fixed bug#18175: The nest_level counter wasn't decremented for union parts which
  resulted in a wrong error message.
  Now the nest_level counter is decremented by 1 for any union part.

  After merge fix


mysql-test/r/multi_update.result:
  After merge fix
mysql-test/r/func_in.result:
  After merge fix
sql/item_cmpfunc.cc:
  After merge fix

mysql-test/t/func_in.test:
  Auto merged

into moonbone.local:/work/18360-bug-4.1-mysql-opt

The IN() function uses agg_cmp_type() to aggregate all types of its arguments
to find out some common type for comparisons. In this particular case the 
char() and the int was aggregated to double because char() can contain values
like '1.5'. But all strings which do not start from a digit are converted to
0. thus 'a' and 'z' become equal. 
This behaviour is reasonable when all function arguments are constants. But 
when there is a field or an expression this can lead to false comparisons. In
this case it makes more sense to coerce constants to the type of the field
argument.

The agg_cmp_type() function now aggregates types of constant and non-constant
items separately. If some non-constant items will be found then their
aggregated type will be returned. Thus after the aggregation constants will be
coerced to the aggregated type. 


mysql-test/t/func_in.test:
  Added test case for bug#18360: Incorrect type coercion in IN() results in false comparison.
mysql-test/r/func_in.result:
  Added test case for bug#18360: Incorrect type coercion in IN() results in false comparison.
sql/item_cmpfunc.cc:
  Fixed bug#18360: Incorrect type coercion in IN() results in false comparison.
  The agg_cmp_type() function now aggregates types of constant and non-constant
  items separately. If some non-constant items will be found then their
  aggregated type will be returned. Thus after the aggregation constants will
  be coerced to the aggregated type.

mysql-test/t/multi_update.test:
  Auto merged

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

extra/yassl/include/yassl_error.hpp:
  Import patch yassl.diff
extra/yassl/mySTL/stdexcept.hpp:
  Import patch yassl.diff
extra/yassl/src/yassl_error.cpp:
  Import patch yassl.diff
extra/yassl/src/yassl_int.cpp:
  Import patch yassl.diff
extra/yassl/taocrypt/src/integer.cpp:
  Import patch yassl.diff
extra/yassl/taocrypt/src/misc.cpp:
  Import patch yassl.diff

into  devsrv-b.mysql.com:/users/msvensson/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  shellback.(none):/home/msvensson/mysql/mysql-5.0

into  devsrv-b.mysql.com:/users/msvensson/mysql-5.0

client/mysqldump.c:
  after merge fix.
    - 'lengths' declaration moved to the beginning of the block.

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0


mysys/default.c:
  Auto merged
mysql-test/mysql-test-run.pl:
  Merge backport
mysql-test/mysql-test-run.sh:
  Merge backport
mysql-test/r/mysqldump.result:
  Manual merge
mysql-test/t/mysqldump.test:
  Manual merge

into  mysql.com:/usr/home/ram/work/mysql-5.0


client/mysqldump.c:
  merge (used ul)
mysql-test/r/mysqldump.result:
  merge (used ul)
mysql-test/t/mysqldump.test:
  merge (used ul)

In multi-table delete a table for delete can't be used for selecting in
subselects. Appropriate error was raised but wasn't checked which leads to a
crash at the execution phase.

The mysql_execute_command() now checks for errors before executing select
for multi-delete.


mysql-test/t/multi_update.test:
  Added test case for bug#19225: unchecked error results in server crash
mysql-test/r/multi_update.result:
  Added test case for bug#19225: unchecked error results in server crash
sql/sql_parse.cc:
  Fixed bug#19225: unchecked error results in server crash
  The mysql_execute_command() now checks for errors before executing select for multi-delete.

into  mysql.com:/home/emurphy/iggy/mysql-5.0


sql/mysqld.cc:
  Auto merged

into  mysql.com:/home/kgeorge/mysql/5.0/clean

into  mysql.com:/home/kgeorge/mysql/5.0/B18681


sql/sql_acl.cc:
  Auto merged
sql/table.cc:
  Auto merged
mysql-test/r/view_grant.result:
  resolved conflict
mysql-test/t/view_grant.test:
  resolved merge conflict

into  mysql.com:/home/kgeorge/mysql/5.0/B18681


sql/mysql_priv.h:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged

into  mysql.com:/home/kgeorge/mysql/5.0/B14875

When reading a view definition from a .frm file it was
throwing a SQL error if the DEFINER user is not defined.
Changed it to a warning to match the (documented) case
when a view with undefined DEFINER user is created.


mysql-test/r/view_grant.result:
  test case for the bug
mysql-test/t/view_grant.test:
  test case for the bug
sql/sql_acl.cc:
  Initialized the members to no privileges so even if
  the subsequent checks fail it will still initialize
  the security context.
sql/table.cc:
  Turned the error of undefined DEFINER user in reading 
  a view definition to a warning.

The check for view security was lacking several points :
1. Check with the right set of permissions : for each table ref that
participates in a view there were the right credentials to use in it's
security_ctx member, but these weren't used for checking the credentials.
This makes hard enforcing the SQL SECURITY DEFINER|INVOKER property
consistently.
2. Because of the above the security checking for views was just ruled out
in explicit ways in several places.
3. The security was checked only for the columns of the tables that are
brought into the query from a view. So if there is no column reference
outside of the view definition it was not detecting the lack of access to
the tables in the view in SQL SECURITY INVOKER mode.

The fix below tries to fix the above 3 points.


mysql-test/r/grant.result:
  removed nondeterminism (unspecified order) in some test output
mysql-test/r/view_grant.result:
  Somewhat extended test case for the bug and similar queries.
mysql-test/t/grant.test:
  removed nondeterminism (unspecified order) in some test output
mysql-test/t/view_grant.test:
  Somewhat extended test case for the bug and similar queries.
sql/mysql_priv.h:
  A wrapper for setup_tables that also checks access to the tables
sql/sql_acl.cc:
  removed artificial security check stop and used the table ref's credentials.
sql/sql_base.cc:
  a wrapper for setup_tables to check access to the tables
sql/sql_delete.cc:
  wrapper called.
sql/sql_insert.cc:
  wrapper called
sql/sql_load.cc:
  wrapper called
sql/sql_parse.cc:
  wrapper called and artificial check stop removed
sql/sql_select.cc:
  wrapper called
sql/sql_update.cc:
  wrapper called
sql/table.cc:
  Mask table access to the view error as well.

sql/ha_ndbcluster.cc:
  compile fix for Solaris 10 AMD64 -max GCC

into  mysql.com:/space/pekka/ndb/version/my50-bug14509

into  mysql.com:/space/pekka/ndb/version/my50-bug14509


ndb/src/ndbapi/DictCache.cpp:
  Auto merged
ndb/src/ndbapi/DictCache.hpp:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged

into  mysql.com:/home/kgeorge/mysql/5.0/clean

into  mysql.com:/home/kgeorge/mysql/5.0/B18742-2

into  mysql.com:/home/kgeorge/mysql/5.0/B18742-2

into  mysql.com:/home/kgeorge/mysql/5.0/B19700


sql/item.h:
  Auto merged

  
The unsigned flag in Item was not propagated through the single value subqueries.
This caused the result to be treated as signed.


mysql-test/r/subselect.result:
  Added testcases for bug #19700
mysql-test/t/subselect.test:
  Added testcases for bug #19700
sql/item.h:
  Preserved the unsigned flag in Item_subselect
sql/item_subselect.cc:
  Preserved the unsigned flag in Item_subselect

into  mysql.com:/home/my/mysql-5.0

into  mysql.com:/home/my/mysql-5.0


sql/mysqld.cc:
  Auto merged

Replaced COND_refresh with COND_global_read_lock becasue of a bug in NTPL threads when using different mutexes as arguments to pthread_cond_wait()
The original code caused a hang in FLUSH TABLES WITH READ LOCK in some circumstances because pthread_cond_broadcast() was not delivered to other threads.
This fixes:
Bug#16986: Deadlock condition with MyISAM tables
Bug#20048: FLUSH TABLES WITH READ LOCK causes a deadlock


mysql-test/r/flush.result:
  Added test case for deadlock with FLUSH TABLES WITH READ LOCK
mysql-test/r/lock_multi.result:
  Test for bug in LOCK TABLE + optimize table
mysql-test/t/flush.test:
  Added test case for deadlock with FLUSH TABLES WITH READ LOCK
mysql-test/t/lock_multi.test:
  Test for bug in LOCK TABLE + optimize table
sql/lock.cc:
  Replaced COND_refresh with COND_global_read_lock becasue of a bug in NTPL threads when using different mutexes as arguments to pthread_cond_wait()
  The original code caused a hang in FLUSH TABLES WITH READ LOCK in some circumstances because pthread_cond_broadcast() was not delivered to other threads
sql/mysql_priv.h:
  Added COND_global_read_lock
sql/mysqld.cc:
  Added COND_global_read_lock
sql/sql_base.cc:
  More DBUG statements
  Added a broadcast in remove_table_from_cache() to release any threads waiting in open

into  april.(none):/home/svoj/devel/mysql/BUG17001/mysql-5.0